As large-scale vanadium flow battery deployment accelerates, each breakthrough in materials is quietly redefining the performance boundaries of the industry. Recently, the Porimion® high-conductivity flow battery membrane, independently developed by Hestor New Materials, was successfully applied in a 5,000 m³ vanadium electrolyte production line. The membrane has been integrated into the electrolyzer stack and delivered on schedule, providing real-world validation of the robustness of non-fluorinated membranes and supporting efficient, stable, long-life operation of electrolyte production systems.

As the “heart valve” of flow batteries and electrolyzer equipment, the membrane directly determines stack efficiency, energy consumption, and service life. The Porimion® membrane used in this project is based on an innovative non-fluorinated polybenzimidazole (PBI) material, engineered specifically for high current-density conditions. Designed to withstand the demanding environment of vanadium electrolyte production, it marks a critical step from laboratory innovation to industrial-scale application.

Application Deployment: Supporting Vanadium Electrolyte Production at Scale

In vanadium electrolyte manufacturing, high current efficiency and long-duration stable operation are essential. Thanks to its high mechanical strength, low vanadium ion permeability, and strong corrosion resistance, the Porimion® membrane enables efficient, low-energy-consumption, and long-life electrolyzer operation. Its successful implementation signifies that next-generation non-fluorinated ion-exchange membranes have moved beyond R&D toward full industrial and equipment-level adoption, offering a high-performance “core component” for the flow battery value chain.

Performance Advantages: Four Key Values for Electrolyzer Stacks

• Ultra-thin design for higher efficiency:
  A 25 μm homogeneous structure delivers ≥40 mS/cm ionic conductivity, boosting current efficiency and reducing energy consumption.

• Ultra-low vanadium crossover:
  A vanadium diffusion coefficient of 9.0×10⁻⁸ cm²/min—one order of magnitude lower than traditional fluorinated membranes—supports ≥99% coulombic efficiency, improves electrolyte purity, extends system life, and significantly reduces self-discharge in grid-frequency-regulation applications.

• High durability for long-term operation:
  Tensile and puncture strength are over 80% higher than fluorinated membranes, resisting fiber penetration and mechanical damage under pumping and high-pressure conditions.

• Green and non-fluorinated:
  Fluorine-free and degradable, compliant with EU and North American defluorination regulations, ideal for high-end global energy-storage projects.

Verified Performance: Outperforming Fluorinated Membranes

In practical performance tests, the Porimion® membrane shows exceptional performance:

It achieves energy efficiency of ≥83.5% at a high power density of 180 mW/cm², far outperforming conventional perfluorinated membranes;

It retains over 81% energy efficiency even at an ultra-high power density of 240 mW/cm²;

No performance decay occurs after 5,000-cycle accelerated aging, with industry-leading durability.

Actual test data proves that the Porimion® membrane is ideal for both energy storage stacks and vanadium electrolyte electrolysis stacks.

From material innovation to engineering deployment, and from lab data to production-line delivery, Hestor New Materials is enabling higher efficiency and lower costs in vanadium electrolyte production with the Porimion® high-conductivity membrane. Moving forward, the company will continue advancing non-fluorinated membrane technology to deliver superior performance, reliability, and scenario adaptability—supporting high-quality development of flow batteries and long-duration energy storage, and contributing to a net-zero future.